Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d33d7ee861ff0e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-01 15:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 29358c6cb2681ff408f75468fbd24f6d SHA-1: 4c87eae713834a672b79915f7f9bb925a3bbe0ce SHA-256: 02d33d7ee861ff0e28f6c333ec46cfa0685b8ce1c4e12dab61c79858a1cd364b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing an embedded JavaScript stream and a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate maliciousness, consistent with a phishing or malware distribution lure. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ikansambel.com/contents//files/12836908950.pdf In PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f85bc093d3ad68195f4a17afb4d8680c/51686592895.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/6596410024.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/89715177223.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/vovivolasajigalovenikavus.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609071136640b---47746532491.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/25928040494.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/gowedozezakuko.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086016b989a---84391343141.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/b56dea0747fb06f99f1edf3024bef664/79256346668.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/96678312898.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c475399d4---30310052585.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/7457419439.pdfIn PDF document text
    • http://clubchic.lv/c/i/files/sisaduximifovoxizakisi.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/wunitulixis.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/vadul.pdfIn PDF document text
    • https://hoongnau.com/upload/files/pileseporalafinajuze.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/01010e7c7bc6f877578e71f92a0bbf3b/likamidejivofepoma.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/38785309729.pdfIn PDF document text
    • https://bamor.org/userfiles/file/3706763651.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9837d5683de63dcfcdc60ae89a7c70b0/5794195620.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a870f62b7a1---91282147008.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/161201a4769cc6---nedise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=eagleview+downingtown+paPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59C 16772 bytes
SHA-256: 2ed344039943c6d43bfc1c31f5e842164d59f8c2a36645b9e4632ab325b4a04f
font_02_sfnt_off00012111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12111 10432 bytes
SHA-256: eb304cab559b1469071f1346220a22a75a2e3d544dce5c174ac5bfd7fdb325ef

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